Anyone who have seen slammer in action wont never forget how powerful that worm is. Curious enough, more than 2 years later, in 2007 while I was helping the guys who manage one of Italy's biggest data center, the IPS there keep on detecting slammer 376-bytes packets.

I don’t think another ms sql will cause same spearding power as slammer, as these days, only ignorant people will leave UDP port 1434 open...